1

Harriet Tubman secretly worked as a Union spy

Most Americans know Harriet Tubman for her leadership of the Underground Railroad, but during the Civil War, she also became a Union scout and spy in South Carolina. Working with Colonel James Montgomery, Tubman gathered intelligence from enslaved people living behind Confederate lines near the Combahee River .

In June 1863, Tubman helped lead the Combahee River Raid, guiding Union gunboats through Confederate waters filled with hidden mines. The operation freed more than 700 enslaved people and made Tubman the first woman known to lead a major U.S. military mission.

2

Julia Child worked for the U.S. intelligence agency

Before becoming television’s most famous chef, Julia Child joined the Office of Strategic Services, or OSS, in 1942 during World War II. The OSS later evolved into the CIA. Too tall to enlist in the Women’s Army Corps, Child instead classified files and overseas communications in Asia.

One of her strangest assignments involved helping researchers develop shark repellent for Navy explosives and emergency rescue kits . The repellent used copper acetate and black dye to create an odor similar to a dead shark.

3

Benjamin Franklin conducted unofficial spy work in Europe

Benjamin Franklin was more than a scientist and Founding Father. During the American Revolution, he quietly acted as an intelligence organizer while serving as ambassador to France beginning in 1776 . Franklin cultivated secret alliances, intercepted information, and used coded correspondence to support the colonies’ fight against Britain.

Operating from Paris, Franklin built relationships with French officials and helped persuade France to support the American cause with money, troops, and naval power. Historians consider his diplomatic intelligence efforts essential to the American victory at Yorktown in 1781 and eventual independence.

4

Louisa May Alcott published thrillers under another name

Louisa May Alcott became a literary icon after publishing Little Women in 1868, but few readers knew that she had already written sensational thrillers under the pen name "A.M. Barnard." These stories featured revenge, hidden identities, forbidden romance, and dramatic crime plots that shocked Victorian audiences.

Alcott used a pseudonym because publishers often expected women writers to produce respectable domestic fiction. Many of her darker stories remained forgotten until scholars rediscovered them in the 1940s. Today, titles like Behind a Mask reveal a far more rebellious side of the beloved author.

5

Maya Angelou worked as San Francisco’s first black female cable car conductor

Long before becoming a celebrated poet and author, Maya Angelou made history in San Francisco during the 1940s. At only 16 years old, she applied repeatedly for a conductor job on the city’s cable cars after seeing an advertisement that excluded Black applicants .

Angelou refused to give up despite repeated rejection. She eventually became San Francisco’s first Black female cable car conductor in 1944. Years later, she described proudly wearing the blue uniform while working long shifts across the city before launching her writing and civil rights careers.

6

Dr. Seuss created classified wartime propaganda films

Before writing Green Eggs and Ham and The Cat in the Hat , Theodor Geisel, better known as Dr. Seuss, worked on wartime propaganda during World War II. Between 1943 and 1945, he joined director Frank Capra’s Signal Corps unit to produce military training films for American soldiers .

Geisel also drew political cartoons supporting the Allied war effort and criticizing fascism. Some of his films were classified during the war because they contained military training material. His animated work helped explain battlefield strategy and morale issues to thousands of U.S. troops overseas.

7

Babe Ruth once played an entire game with a fever over 102 degrees

In 1925, Babe Ruth became seriously ill during spring training and collapsed while traveling by train . Newspapers nicknamed the incident "the bellyache heard around the world." Reports from the time described Ruth suffering from a fever above 102 degrees while still insisting on returning to baseball activities.

Despite his condition, Ruth’s determination became part of baseball legend. The illness hurt his performance during the 1925 season, when the New York Yankees finished seventh in the American League. Even so, Ruth rebounded quickly and helped lead the Yankees to championships in later years.

8

Harry Houdini worked with police departments

Harry Houdini’s famous escape acts fascinated police departments across America and Europe in the early 1900s. Officers regularly challenged him to escape from handcuffs, prison wagons, and locked jail cells. Houdini often invited local police to inspect restraints before his performances began.

Beyond entertainment, Houdini also worked closely with law enforcement to expose fraudulent mediums and fake spiritualists during the 1920s . Using his knowledge of locks, hidden compartments, and deception, he publicly demonstrated how many supposed supernatural tricks were actually carefully staged illusions.

9

Frank Lloyd Wright hid a private apartment inside one of his buildings

Architect Frank Lloyd Wright secretly maintained a private apartment inside his famous Oak Park Studio near Chicago, Illinois. Built in the 1890s, the studio served as both his workplace and personal retreat while he designed many of his early Prairie-style homes across the Midwest.

The hidden living quarters allowed Wright to work late into the night and host select guests away from public attention. The building itself became one of the most important centers of American architecture, producing groundbreaking residential designs that influenced modern architecture around the world.

10

Muhammad Ali quietly funded humanitarian causes for years

Muhammad Ali’s boxing fame often overshadowed his enormous charitable work. For decades, Ali quietly donated money to hospitals, food programs, children’s charities, and international humanitarian efforts . Friends and family later revealed that many of his contributions were intentionally kept private.

In 1990, Ali traveled to Iraq during tensions leading up to the Gulf War and helped secure the release of 15 American hostages. He also supported global relief organizations and Parkinson’s disease research after his own diagnosis. In 2005, President George W. Bush awarded Ali the Presidential Medal of Freedom.

1

There's an unexplained billion-year gap

Look closely at the canyon walls, and you'll notice something strange: a clean, sharp line where ancient rock simply stops, and a much younger layer begins directly above it.

This geological puzzle is called the "Great Unconformity," and it represents over a billion years of rock layers that are simply absent , as though that stretch of time never happened. In some spots, rock dated 1.8 billion years old sits directly beneath rock that is only 520 million years old. Where did the missing billion years go?

The leading theory involves the violent breakup of an ancient supercontinent, but scientists are still piecing it together.

2

During the Cold War, it hid a nuclear fallout shelter

During the Cuban Missile Crisis in 1962, the U.S. government converted part of the Grand Canyon Caverns into a fallout shelter. This dry cave system, more than 200 feet underground, was stocked with enough food and water to sustain 2,000 people. Naturally, it was never occupied, and the supplies were never used.

The caverns have since been transformed into a tourist attraction, with organized tours winding through the same underground chambers that were once intended as a refuge from nuclear war. You can even book a night's stay there.

3

The Federal Aviation Administration was founded after a crash over the canyon

In 1956, two commercial passenger planes collided in midair over the eastern Grand Canyon, killing all 128 people on board both crafts. Rescue teams struggled to reach the wreckage deep inside the canyon, and the extreme heat of the crash had caused the planes' aluminum to fuse with the bedrock. There were no survivors.

The disaster exposed a terrifying truth: the U.S. air traffic control system was dangerously outdated, relying on pilots' visual estimates and rough guesswork from controllers , with no way to separate fast-moving aircraft from slow ones, or instrument-flying planes from those navigating by sight. Congress responded by passing legislation that created both the Federal Aviation Administration (FAA) and the National Transportation Safety Board.

4

A hoax suggested that an Egyptian civilization had lived there

In 1909, the Arizona Gazette reported that an explorer named G. E. Kinkaid had discovered a vast underground citadel inside the canyon, filled with artifacts linked to ancient Egyptian civilization. He even claimed the expedition had been funded by the Smithsonian.

This story described hieroglyphics on the walls, mummies in the chambers, and relics pointing to a direct connection with the Egypt of the pharaohs. It was incredibly detailed, and it was, of course, a hoax. No evidence for any of Kinkaid's claims ever surfaced.

5

Fewer than 100 people have ever hiked its full length

Among the few people who have completed the through-hike of the Grand Canyon is Jen Hogan, the first woman to accomplish it, finishing her journey in 2021–2022.

It’s a full 800-mile length below the rim. The route involves extreme heat, flash floods, near-impassable areas, and stretches with no water or trail whatsoever. Around 60 or 70 people have reportedly accomplished it. This makes it one of the most exclusive feats on Earth.

6

The Grand Canyon's rocks predate dinosaurs entirely

Visitors scanning the canyon walls for fossils are often surprised to learn they won't find any dinosaur bones here. The rock layers of the Grand Canyon are simply older than dinosaurs. This fact alone can be shocking: staring at its walls means staring at marine fossils from as far back as 1.2 billion years ago. Some of its caves hold the remains of ancient mammals. The canyon is a window into a world that existed long before the dinosaurs, when the land that is now Arizona lay beneath a shallow sea.

7

The park is bigger than Rhode Island

Numbers alone rarely capture the Grand Canyon's scale, so here's a different approach. Rhode Island covers about 1,214 square miles, and the Grand Canyon National Park spans 1,904 square miles.

The canyon's depth exceeds four Empire State Buildings (which is 1,454 feet) stacked on top of one another. That’s 6,093 feet at its deepest point.

8

But it's not the deepest canyon on Earth

For all its grandeur, the Grand Canyon does not hold the depth record. Pictured above, the Yarlung Tsangpo Grand Canyon in Tibet, China, plunges to 17,567 feet, which is nearly three times deeper. Carved by the Yarlung Tsangpo River as it cuts through the eastern Himalayas, that canyon is so remote and extreme that it remained largely uncharted until the late 20th century.

9

It is home to a pink rattlesnake found nowhere else on Earth

The Grand Canyon Pink Rattlesnake has a pinkish-red coloring that matches the canyon's own distinctive rock walls so closely that it's nearly invisible. It is found nowhere else in the world. Officially classified as Crotalus oreganus abyssus , it has darker diamond-shaped markings along its back that deepen the camouflage further.

10

There's a village at the bottom: Supai Village

For over 1,000 years, the remote village of Supai has been home to the Havasupai Tribe, the People of the Blue-Green Waters. It is located an eight-mile hike from the rim, but sits roughly 3,000 feet deep inside the Grand Canyon.

The U.S. Department of Agriculture has called it the most remote community in the contiguous United States, and it has no automobiles and no road access. The only ways in are on foot, by mule, or by helicopter. It is also the only place in the United States where the postal service still delivers mail by mule train.

1

Rachel Jackson: A "Bigamy" scandal (1820s)

In 1791, a young Andrew Jackson married Rachel Donelson. Both believed her first husband, Captain Lewis Robards, had successfully finalized their divorce. Apparently, Robards didn’t file the petition, making her marriage to Jackson technically bigamous. Once the divorce went through in 1794, they officially remarried.

During the 1828 presidential campaign, Jackson’s political opponents used this legal mistake against him. They branded Rachel a loose woman and a bigamist in pamphlets scattered across the country. The intense public shaming broke her spirit and deteriorated her health. She suffered a fatal heart attack just days before Jackson’s inauguration, leaving the newly elected president heartbroken and extremely bitter toward his political rivals for the rest of his life.

2

Grover Cleveland’s illegitimate child (1884)

Decades later, another personal bombshell rocked another presidential race. Republican opponents revealed that Democratic nominee Grover Cleveland, a bachelor praised for his integrity, had fathered a child out of wedlock with a widow called Maria Halpin ten years before.

Republicans paraded through the streets chanting, "Ma, Ma, where’s my Pa?" Instead of denying the affair or trying to bury it, Cleveland instructed his campaign managers to do something radical: "Tell the truth." He admitted to supporting the child financially. His honesty caught his opponents off guard and won over voters who were tired of such dirty political tactics.

3

The Crédit Mobilier scandal (1872)

This particular scandal stands as one of the most shameless corporate schemes of the Gilded Age. Stockholders of the Union Pacific Railroad formed a fraudulent construction company called Crédit Mobilier of America . Then, they hired themselves to build the transcontinental railroad at inflated prices, pocketing tens of millions of dollars in federal subsidies.

To prevent Congress from investigating their profit margins, Congressman Oakes Ames distributed discounted shares of the company’s stock to influential politicians, including Vice President Schuyler Colfax. When the press exposed the story in 1872, the revelation that lawmakers were bribing themselves tarnished the legacy of the Ulysses S. Grant administration.

4

The Whiskey Ring scandal (1875)

A few years later, another financial disaster hit the Grant administration. The Whiskey Ring was a widespread conspiracy involving distillers, distributors, and internal federal tax officials who stole millions of dollars in liquor taxes.

Using a complex web of bribes and falsified records, the ring defrauded the U.S. Treasury. The scandal reached the inner circle of power when President Grant’s own private secretary, Orville Babcock, was indicted as a ringleader. Grant provided a deposition in his secretary’s defense. While this saved Babcock from prison, it permanently damaged the president’s reputation.

5

The Teapot Dome scandal (1920s)

Until Watergate occurred, Teapot Dome was synonymous with political corruption. During the administration of Warren G. Harding, Secretary of the Interior Albert Fall took control of valuable federal oil reserves located at Teapot Dome, Wyoming, and Elk Hills, California.

Instead of opening these fields up for competitive bidding among energy companies, Fall secretly leased the drilling rights to private oil tycoons in exchange for more than $400,000 in bribes.

6

The Chappaquiddick incident (1969)

By the mid-20th century, the nature of political scandals shifted. Secrets began to involve personal crisis and tragic losses.

In July 1969, Senator Edward "Ted" Kennedy drove his car off a narrow wooden bridge on Chappaquiddick Island, Massachusetts. The vehicle overturned into a tidal pond, trapping and drowning his passenger, 28-year-old campaign worker Mary Jo Kopechne. Kennedy managed to escape but failed to report the fatal accident to the police for ten hours. Although he eventually pleaded guilty to leaving the scene of an accident, his delayed reaction ended his lifelong presidential ambitions.

7

The Pentagon Papers (1971)

In 1971, military analyst Daniel Ellsberg felt the moral obligation to leak a top-secret 7,000-page Department of Defense study detailing U.S. political and military involvement in Vietnam from 1945 to 1967.

Published by The New York Times , the papers exposed a disturbing truth: successive administrations had systematically lied to both Congress and the American public. The documents proved that the government had expanded the war and increased troop counts while knowing that the conflict was unwinnable. The Supreme Court eventually rejected the government’s attempts to block the leaks, making a victory for freedom of the press.

8

The Watergate scandal (1972–1974)

This is, probably, the ultimate American political scandal. In June 1972, five men were arrested breaking into the Democratic National Committee headquarters at the Watergate complex in Washington, D.C.

The break in itself was minor compared to the illegal cover-up orchestrated by President Richard Nixon and his collaborators. From paying hush money to instructing the CIA to block the FBI’s investigation, Nixon’s complicity was exposed via his own secret White House taping system. Facing impeachment and conviction by the Senate, Nixon became the first and only U.S. president to resign from office.

9

The "Keating Five" (Late 1980s)

During the Savings and Loan crisis of the late 1980s, five U.S. Senators—John McCain, Alan Cranston, Dennis DeConcini, John Glenn, and Donald Riegle—came under intense scrutiny.

The group was accused of intervening with federal banking regulators on behalf of Charles Keating, the chairman of Lincoln Savings and Loan, who had contributed to their political campaigns. Lincoln eventually collapsed, costing American taxpayers over $3 billion. Although the Senate Ethics Committee ultimately cleared the senators of corruption, they were publicly condemned.

10

The Bill Clinton–Monica Lewinsky affair (1998)

The 20th century ended with a scandal that blended personal infidelity with a constitutional crisis. In 1998, news broke that President Bill Clinton had an intimate relationship with a 21-year-old White House intern called Monica Lewinsky.

The affair turned into a legal battle when Clinton denied the relationship under oath during an unrelated sexual harassment lawsuit. The investigation led to Clinton’s impeachment by the House of Representatives on charges of perjury and obstruction of justice. The Senate ultimately acquitted him, yet he couldn’t bypass the media circus.